Buckeye here's the simple answer......Jerry's work is more expensive because it's worth it!!!
To elaborate, I can not tell you how many friends and people I know who've pay big money to "have their motor done" by some builder and one or more of the following happens:
1) the motor comes back and runs 2 miles and it breaks (usually due to builder "forgetting" to tighten something) destroying your $1,000 cases, $1,500 cylinder, crank, rod, etc...
2) the motor works but not as long as it is suppose to and you have to rebuild it again
3) the motor works but parts are not machined correctly and you have to pay twice to have it done again, correctly this time
4) the motor does not perform like it was advertised or promoted to (it perpetually "needs to be tuned")
5) you get the motor back but you find out it's not the parts you sent in and or or good parts some how disappeared on their own and nobody knows $hit
6) you get your motor or parts back and their done wrong
7) you get you motor or parts back 9 to 36 months later

the builder does not warranty their work against defects in workmanship or stupidity on their part
9) you can reach the builder but their dog ate the cylinder (fill in excuse here) and your motor or parts never materialize
10) your motor/parts never come back, got lost in shipping, the "builder" stops answering
YOUR calls and you have to enlist local buddies to pay them a "friendly" visit to secure your parts if they can even find them
11) you send your parts and pay the builder the money and are never able to reach them again, you donated parts & money to their next project.
12) the builder goes down in a ball of flames and does number 11 to a whole group of people
I'm sure I could go on here but you should be able to get the point......when I send Jerry my stuff it comes back quickly, done and done right, if I have questions I can call him, it performs as advertised and it there is an issue I get a phone call to figure out what needs to be done to fix it right instead of getting no call and receiving some slobbed together piece of crap they tried to make work that breaks on my second trip that I spent $500 to take and costing me thousands in parts and labor to have it redone right.